Air entry device for IC engine exhaust line with catalyser - uses entry pipe with electrically controlled valve regulating air flow rate to ensure optimum cleaning

摘要

The air entry device uses an air entry pipe (9) coupled to the IC engine exhaust line (4), containing an electrically operated control valve (22) regulating the flow rate of the air through the entry pipe (9). The control device (21) for the control valve (22) responds to the information received from a number of sensors (7, 23, 24, 25) monitoring the engine r.p.m. and the pressure and the flow rate in the air intake, the engine r.p.m. and the pressure within the air entry pipe (9), or the product of the engine r.p.m. and the pressure within the air entry pipe (9) and/or the throttle opening. USE - Ensuring optimal air flow rate to provide efficient cleaning of engine exhaust gases via catalyser.